TW200407880A - Optical information recording apparatus and optical information recording medium - Google Patents

Abstract

An optical information recording medium includes a recording layer for recording optical information, a plurality of laminated layers, and a substrate for supporting those layers, while a beam of a specific wavelength is being radiated, a light absorption peak is shifted to a longer or a shorter wavelength side than the peak located before said beam radiation, realizing a high S/N ratio and a high recording density of the medium.

Description

200407880

Description of the invention: [Technical field to which the invention belongs] The present invention relates to an optical information recording device and an optical information recording medium including a light collecting layer. [Previous Technology] Recently, information-oriented society through optical communication requires the development of a new communication system that provides the ability to quickly convey a large amount of information. As an optical device indispensable for the development of such a large and fast optical communication, refer to— An optical poor recording medium compressing the Dali optical poor. In addition, digitized images (such as TV images) or enhanced image quality (such as TV high-definition images) urgently require the development of a large number of optical information recording media that can maintain high image quality and long-term ball-to-quality images. At present, a DVD (Digital Video Disc) with a capacity of 4.7 GB on one side is used as a light-poor recording medium. It is widely used in computer media or media recording large I animations (such as video applications). Practically, this type of DVDs can be used as ROMs (DVD-ROMs) on which optical information can be written directly, as well as rewritable recording and optical media reproduction. The optical information recording medium has been developed to enhance the recording density. In order to make the information recording density higher, a short-wavelength laser beam is used. The laser beam has a wavelength of 650 nm, which is shorter than the laser beam wavelength used by cd, etc. (780 nm). However, to process large amounts of information, such as computer graphics or digital high-vision images, the recording density must be four to five times that of the short-wavelength laser beam described above. To achieve this goal, a new optical disc is currently being developed. The new optical disc is suitable for a very short wavelength (405 nm) blue semiconductor laser with a storage capacity of 2 7 GB on one side. 85345 200407880 k As for the degree of enhancement of the green compact residence, you can refer to the formation of a light-concentrating layer. The light-concentrating layer is a coating film, which is formed on the optical recording medium. The top or bottom of the optical recording layer. a. This skin is used to reduce the & h beam spot of the incident rays passing or reflected by the film itself, so as to make the recording density higher. This technology promotes the above-mentioned techniques to shorten the laser wavelength, σ, σ 3, and makes it possible to increase the storage capacity of the disc. The breeze is used to cause the condensing effect. ^ The mechanism is an absorption saturation phenomenon, which uses this non-linear optical characteristic. The condensing layer is used to pass Le Ling,,, and Shi with higher intensity than absorption saturation. The same shots, and springs, absorb the radiation with a lower intensity. The spatial intensity of the laser beam used to pick up or enter the poor information is distributed in a Gaussian manner. Therefore, it is known that the beam m passes through the condensing layer 0, and the base of the lower-intensity beam is absorbed by the condensing layer. The central part of the high-intensity beam is open, which makes it possible to reduce the beam diameter after passing through the layer. The constituent materials of such layers can be referred to the organic film or chalcogenide compounds of the cyan dye system described in jP-A | 964] 2, such as the hot chromium material described in 6 1 62564 or JP. Organic materials such as the light chromium material described in -A-6-267078 can also be used to form the light-concentrating layer. For example, light-concentrating materials such as hot chrome materials or light chrome materials emit daggers through beams ... or the excitation will increase their extinction coefficients, so that a layer composed of such materials will reduce their transmission or reflection. #, The final laser beam cannot reach the power required to read information from the media. In order to overcome this shortcoming, in JP_A_20GU273679, a super-resolution re-filming (consisting of a light-concentrating material) is used to cut an interference layer on the incident surface of the spoon, and it is emitted by a larger beam that is higher than the preset gate Ludan. The extinction coefficient of the film is selectively increased. The 85345 200407880

The layer is composed of a low-refractive-index layer and a high-refractive-index layer. The interference layer is used to increase the reflectivity of the beam emitted onto the optical information medium. "P_A-2_ · 3438 1 Explains an optical recording medium with a mask layer. The light transmission characteristics of the mask are changed by beam emission. The lambda mask layer is a light-concentrating functional layer. JP-A- 丨 0_3404δ2 describes a recording medium with a broken glass layer, in which the intensity of the emitted beam and the transmitted beam varies non-linearly. 1 Purpose is to improve the durability of organic films (identified as super-resolution films). force. [Summary of the Invention] However, the above-mentioned two technologies composed of the super-resolution film have the disadvantage of lower s / n ratio. The purpose of the present invention is to provide an optical information medium with a super-resolution film as a component. S / N ratio. According to the concept of the present invention, the optical information recording medium includes a recording layer for recording optical information, a plurality of stacks, and a substrate for supporting them, and a spectrum during a laser beam emission. The light absorption wave of the reflective curve is shifted to the -wavelength side, which is longer or shorter than the wave before the radiograph emission. Furthermore, an optical information recording device is provided and configured to use the optical information recording medium. The following description of examples of the present invention in conjunction with the accompanying drawings will make other objects, features, and advantages of the present invention clear. [Embodiment] Before explaining a plurality of examples, the present invention will be briefly described with reference to the drawings. The light-depleted 1 recorded medium is composed of a recording layer and a plurality of stacks, and the recording layer is used directly or via another layer. One layer and the green light information is recorded on its substrate, the multiple stacks are cut by a dielectric layer! And another combination of the dielectric layer 2 η 2 S5345 200407880. These layers 1 and 2 are directly or through another layer of light: the message :::: is formed at the bottom or the bottom, and is read or nested for the emission; the increase in the intensity of Γ can reduce this inversely. The number of shots of each layer of the same layer, ψ can be directed to the low extinction coefficient of each layer of the laser beam. It is best to repeat the cycle: the drop is more than ten times. 4 months, 4 times, especially, and 2 :: The optical information recording medium is formed by the above-mentioned optical recording layer, the combination of two # layers, and the combination of the two layers. The combination consists of cutting-dielectric layer 2 and one two seven two. _To r, "to be composed of tangent- = two =. For the intensity of the laser beam used to read or write the optical data, the person's refractive index increases or decreases in two directions. For the emitted, the increase in the intensity of the beam can inversely reduce its extinction coefficient. Tian Tanshi: The thickness of the cladding 1, dielectric layer 2 or dielectric layer 3 (which constitutes the optical information recording medium) and the refractive index (by The intensity of the laser beam is 2 degrees. The measured product of the laser beam of 2 is 16% of the laser wavelength, which means that the product is about a quarter of the wavelength of the emitted beam. The dielectric layer 1 includes a first | value that has a greater amount of light or intensity: ::: um has a specific threshold light coefficient, the extinction system _ to one ;: two _ is weaker or reduces the imaginary part of its refractive index of the bary soil, and The absorption ratio of the toilet absorption system. When the material jl is ancient, dark. When the field material has a large matting wire, the material will be better than: It is a better material for the dielectric layer 1. 'The system uses the following groups of gold,' and selected oxides or sulfides of transition metals: lead, iron, nickel, H5345 200407880, junction, road, cadmium, iron, silver, platinum, and gold. Or, a film made of glass can also be used as the layer 1, and at least one transition metal particle is dispersed in the text. The dielectric layer 2 or 3 includes silicon and silicon oxide, nitride, and sulfide. The dielectric layer 1 is preferably composed of C0304, and the material selected from the group consisting of ± 1, Z n S-S i02 and S i 3 N 4 constitutes the dielectric layer 1 2 The first to third dielectric layers 208, ^ shown in Fig. 20, each beam has its own refractive index. The optical data Λ5h surface: the light of the medium ^-the Yong layer is composed of a substrate The formation of the protrusions or grooves formed on the substrate. Straight & or the information formed on the substrate through another layer can be based on: invention '-a better information recording medium includes a layer for recording optical resources = 5 hexahedral red layer. , A plurality of stacks, &-a substrate to support the recording layer and a plurality of "". The right-to-fire laser beams are contending in the spectrum reflectance curve That is, the light and the receiving waveguide are shifted to the -wavelength side, whose ratio is in front of the emitted laser beam, and the peak length is shorter or shorter. It is better that the rising angle of the absorption peak is not less than 60 degrees ~ the sharp wave of the emission ratio curve The rising characteristics of the information cause the information recording medium to have a high S / N ratio later. The present invention will be described in detail below with examples. (First example) Photograph% 4 4 light shell vanadium! The side composition of the recorded, which has according to the present invention Structure = rewritable RAM structure. In Figure 1, the number! Indicates-substrate, number 2 Hi reflective layer, number 3 represents a protective layer, number 4 represents-recording layer,〕] represents a light-concentrating layer. Layer 5 is a combination of dielectric layers 6 and 7 repeatedly: it is represented by a number of 8-a cover layer, a laser beam for reading and writing information enters from the cover layer 8, passes through the layers and reflects at the boundary of each layer, and finally reflects at Reflected -10-200407880 The reflected laser beam on layer 2 enters a light detector (not shown). According to the present invention, the 'substrate 1 is composed of polystyrene and has a thickness of 11 mm and a diameter of 120 mm', and a plurality of substrate sandwich holes each having an internal diameter of 15 mm (p. The reflective layer 2 is composed of It is composed of aluminum-3% titanium alloy. Layer 2 has a thickness of 50 nm. In addition, protective layer 3 is made of 8021 ^ -2031〇2 (molecular ratio) material. Layer 3 has a thickness of 70 nm. 4 is composed of 10 Ge-70Sb-20Te (molecular ratio), and the thickness of layer 4 is 20 nm. It is used to form the light-concentrating layer 5, and the dielectric layer 6 is composed of c0304 and has a thickness of 70 nm 'and The dielectric layer 7 is composed of 80ZnS_2〇SiO2 (molecular ratio) and has a thickness of 70 nm. In this example, the light-concentrating layer 5 is a five-cycle period of these dielectric layers 6 and 7, One cycle indicates that a thin film layer is formed by a group of dielectric layers 6 and 7. Therefore, five cycles indicate that the interlayers of five dielectric layers 6 and five dielectric layers 7 are alternately sandwiched, that is, a total of ten layers. A polycarbonate sheet with a thickness of 0 mm is adhered to the cover layer 8 by using an ultraviolet processing resin, and the pasting is performed by uniformly rotating the polycarbonate substrate formed on the film. Dispose the ultraviolet processing resin, and place a polyphosphonic acid sheet having the same inner diameter and peripheral outer diameter as this sheet so as to just overlap the substrate, and emit an ultraviolet light from the Uv lamp placed above for processing. The resin. Layers 2 to 7 were formed by sputtering technology, reflective layer 2 was formed by DC magnetron sputtering technology, and reflective layers 3 to 7 were formed by RF magnetron sputtering technology. The sputtering gas was argon 'and the gas pressure It is about G.7 Pa. Each layer is formed by rotating the substrate on the substrate axis and orbiting the substrate when applying a 0.2 to 1 kw # rate to a target having an inner diameter of 52. * ιτιπιφ. The perspective view of the section illustrates the optical disc. In Fig. 6, the number 1 represents a Fu 200,407,880 plate 'number_ represents the figure w shows a plurality of stacked 2 to 8' number: recording information recording pattern. As shown in Figure 16, this example Center: The disc includes a flat ground-groove structure, where information is recorded in ^. Thousands of oblique and groove parts are. When = by-counting aperture-like condenser lens to focus the laser, 4 5 5 _ The wavelength of the semiconductor laser Λ field 奵 4 / special boat formation side will be added , Recording, f system and erasing, in order to achieve the purpose of estimating the characteristics of the optical disc .... From: a suitable layer (as shown in Figure b is 5, with a periodicity of the dielectric layers 6 and 7 "1 two ΓΓ have individual refractive index And extinction coefficient) structure of the two-body or -dielectric multilayer film. According to the present invention, the light intensity exceeds the predetermined intensity, and "" the intensity of the beam or its coefficient. The degree of h is changed inversely. Refractive index and extinction index: A film of the dielectric layer 6 is formed on a flat broken glass substrate, and the refraction f _ ,, ^ 4 and the number of shots are changed by using a laser beam on / on. Figure 2 is an elliptical meter used to illustrate the change of the emission index or extinction coefficient (el one to one ... ^ number 1 represents-substrate, number 6 represents-dielectric layer, number 9 represents a pulse generator, number 丨 〇 Lecture ^. Represents a light source, the number U represents a polarized light ^ demon character 丨 2 represents-W beam, number η represents-reflected beam, number 14 analyzer, number 15 represents-chirp waver, number 16 represents-light receiving state , The number 17 represents _ potential 焱 Sabubowei, the number 18 represents a control computer channel = 19th generation m, mirror. Use a half-wave with a thin and 405 _ wavelength as the light source 10 ′ through the effect of the pulse generator 9 This laser beam H has a pulse beam with a period of M degrees and a time interval. The pulsed beam is polarized by 85345 -12-200407880 of a polarizer, so that the vibration of the beam faces: the surface of the test sample becomes A parallel (S-polarized) beam or a vertical (polarized) beam. In addition, you focus the laser beam on the surface of the test sample by the focusing lens 19. If the wavelength is 65nm, the The laser diameter of the optical part is 〇9 μΠΊ, but if the wavelength is 405 nm, it is 〇 6 μπι. :: Instrument polarized light beam 芏 on the test sample, and make the S polarized light beam and ρ _ Υ " reflectance and phase of the beam, according to the film thickness of the test material, refractive index = and / Xiaoguang coefficient It is different. Therefore, the refractive index and extinction coefficient can be estimated by measuring the film thickness in advance and deriving the ratio of the reflectance of the S-polarized beam to the ρ_polarized beam and its phase. In this paper, a complex number represents In fact, the refractive index represents a refractive index (..., and its imaginary number is tf extinction coefficient (k), where k is an I number of the light absorption coefficient of a relevant material, which is a unitless mass. It is proportional to the absorption coefficient. By placing the analyzer 14 on the reflected beam receiving side and rotating the analyzer, the reflection ratio of the polarized beam and p-polarized light are derived from the amount of reflected light obtained from each angle of the analyzer. The ratio of the beam and its phase. The angle of the analyzer is derived by dividing a rotation of the analyzer by 12; furthermore, when the incident light includes an amount of light exceeding an allowable amount, the light receiver cannot properly analyze the Beam, then Filters for the intensity of each pulsed beam to adjust the reflected light so that it will pass through the light receiving effect due to the effect of 遽 波扎 15 itself. In order to measure the ΐreflected beam, the light introduced into the optical receiver is 6 by an oscilloscope 17 is divided into regular 2 nanosecond (ns) intervals, and then the divided light is measured at regular intervals. The oscilloscope is 17 divided into the east at regular 2 ns intervals and the divided light is measured, which is earlier than the incidence of the pulsed east 50 ns (-50 ns), the measurement is started, and the interval of ~ is measured from the pulse 200407880. In addition, due to the variety of laser or light 1 kukuhiro milk,

__, water,-/ Into the measurement cannot reach such a high C / N II: The measurement cannot reach an accurate measurement. Therefore, the total number of measurements of 4 is its average. Dowon Tai g ^, the index of refraction that appears before the shot of the field shot% is the -50 ns that occurs when the pulse beam is dipped, + and the index of refraction index between the foot and 0 Μ + 5〇1 " The average value of the refractive index between 10 "$. In addition, the refractive index in the two-shot emission is derived as the average value of the refractive index between 50 ns and 100 ns after the pulse rises. And the extinction coefficient of the radioactive intensity of the dielectric layer 6 formed by tritium. Applied Physics Documents Chapter :: Bud: as shown in 2 °° August 2… Read page, pages _ to] _, laser wavelength For the sake of discussion, in Figures 3 and 3, the horizontal axis is the axis-time table. At the time point 0, the time gate rises, and even the time when the laser pulse of Shitian shooting suit is not generated is: = Refractive index ... The rise of the laser pulse leads to the crying of the refractive index: when the laser pulse intensity is 82Gw / m2, the refractive index is -.u and the movement reaches 42%. When the laser beam intensity is lQGw / m2, the refractive index is raised. The index is about 21, and the dried tempeh is 4 daggers. The change of n /, the surface refractive index is about 0.5%. The change of the root laser intensity is the extinction coefficient. The change from 〇85 to 〇65, that is, to reduce the Shaw coefficient by 24%. Considering the half-speed of the increase in laser intensity when the pulse rises in Figure 2, the estimated response to this change in refractive index is -Nye lower. The relationship between the laser pulse intensity and the refractive index is described in Figure 4, and the relationship between the laser pulse intensity and the extinction coefficient is shown in Figure 4. Figures 4 and 5 also illustrate the results of the similar measurement: The red laser mark is used by the device shown in -14-Figure 2. It is used for blue lasers with wavelengths of 405 η + f 2 m, Δ and 1101 (as described with reference to the soil map and 3B), the refractive index ϋ / A Yousheng soil 2.7, but for red lasers with a wavelength of 650 nm, the refractive index is reduced from 33 to 30. The extinction coefficient of the wavelength is reduced from 0.85 to 065 ten thousand faces, and 405 faces m "Under + soil 〇.65 ', but the extinction coefficient of 650 _ wavelength also decreased by 1.15 to 0.6. As shown in Figure 5, for any of these ratios and wavelengths, the condensing $ white I used in this booklet has a low extinction coefficient. In addition, as shown in Figure 4, r is used for 405 wavelengths. The refractive index of the I-bar laser increases the refractive index; the refractive index of the red laser with a wavelength of 650 decreases. A in the test of the last test "The change in the refractive index of this material is caused by a mechanism called the band filling phenomenon. Figures 8 and 19 are clear diagrams of the band filling phenomenon." Dependence, and Figure 19. Xiong Ming refractive index in-wavelength dependence. The film formed by the office used in this example includes an optical band gap 'which has energy corresponding to a wavelength of exactly 50 nm, and therefore' in the case of emitting a beam having a shorter wavelength than that (ie, higher energy). The electrons located at the positions corresponding to the gaps in this band, that is, the absorbed light can excite these electrons. Therefore, as shown in Fig. 18, a beam with a longer wavelength has a smaller extinction coefficient, but a beam with a shorter wavelength has a larger extinction coefficient. When the sight is excited again, the excited state is shifted from the electron with more energy to the electron with a larger amount. In this case, the electron with less energy is excited and has more energy than the excited electron at the beginning. More energy, it is understood that the ton of the wave & gap is higher than the energy of the excited electrons at the beginning. Therefore, the absorption coefficient of light (that is, the S5345 200407880 = coefficient) becomes lower because the beam with a long wavelength but low energy is not received. This trend occurs at all wavelengths, meaning that the extinction is relatively ten thousand; all wavelengths become lower, and because less energy is not absorbed, it is understood that light absorption is usually shifted to the shorter wavelength side. On the other hand, as shown in Fig. 19, the Kramers_Kronig close of the extinction coefficient is used to calculate the refractive index. The energy in the band gap reaches an energy peak. The dependence of the wavelength on the refractive index is similar to the displacement of the extinction coefficient and shifted to the short wavelength side. As a result, we know that the refractive index becomes lower in the band _: around, but the refractive index is higher than that in the band gap in the region with a shorter wavelength, that is, the refractive index change caused by the band filling phenomenon makes the extinction coefficient at all wavelengths. All of them are low, and the refractive index of the high-intensity laser beam is high or low depending on the wavelength. The optical characteristics of the light-concentrating layer 5 (see FIG. 1) are estimated. The light-concentrating layer is generated by cutting a plurality of dielectric layers, and the refractive index of the dielectric layer is changed by emitting a laser beam. The estimation of the child is performed as follows: First, the same multiple stacks as shown in Figure Π are formed on a disc substrate. The disc substrate has a plane called a mirror surface, without the flat-groove structure and the recording information hole shown in Fig. 16. Bumpy surface. A laser beam with a wavelength of 4.05 m was allowed to enter the mirror surface of the optical disc, and then the amount of reflected light was measured using a read head unit. The ratio of the amount of incident light to the amount of reflected light was measured, and from the results shown in Fig. 4, the ratio of the refractive index of each incident light to the dielectric layer 6 was derived. The ratio of the refractive index of the dielectric layer 6 to the change in the amount of reflected light is then derived from the derived refractive index. The method of forming the film or the method of manufacturing the optical disc is the same as the method of manufacturing the optical disc shown in FIG. 1 described above. Figure 6 illustrates the ratio of the reflectance of the electric beam at a wavelength of 40 5 nm to the refractive index of the dielectric layer 6 when the cutting period of the dielectric layers 6 and 7 is changed. In this study, the 200407880 period was changed from 1 to 30 periods. Adjust the thickness of the dielectric layer 6 or 7 so that the product of the thickness and the refractive index becomes 0.25 times the laser wavelength of 405 nm. When the strong layer beam is not emitted in the C0304 layer, the refractive index of the c0304 layer is 19, so the thickness of the dielectric layer 6 will be 53 3 llm. In addition, since the refractive index is -.J 'The thickness of the dielectric layer 7 will be 44.0 nm. As shown in FIG. 6, when the cutting period is one and the refractive index of the dielectric layer 6 is 丨 .9, the reflection of the light-concentrating layer 5 can be made as small as 0.05, and then, when the dielectric layer 6 is small, When the refractive index of 6 becomes 27, the reflectance increases to 〇27. In the case of the second cutting cycle, the reflectance is changed from 0.05 to 0.52, which means that the ratio of the larger reflectance is obtained compared to the ratio in the case of the cycle. Therefore, only the cutting cycle is only increased from one to Two cycles, causing a large change in the reflectance in the same refractive index change. Considering the increase in the number of cycles, in ten cycles, the refractive index changes from 丨 9 to 2 2 The allowable reflectance will change from 0.05 to 0.92 'As shown in Figure 6, it is understood that even the dielectric layer 6 The index of refraction changes by, and more cutting cycles will also result in greater changes in reflectance. Therefore, it is preferable that the number of cutting cycles is greater than five, which is greater than that. Next, it is estimated that the transmittance change that occurs when the number of cycles of the light-concentrating layer composed of the cutting film is changed & The ratio of the number, from the change of the shot ratio, can increase the @ _ number of cycles, which can make the layer thickness thicker, thereby making the transmission ratio of the layer quite small and small, and it can be understood that when the number of cycles exceeds 30, It will make the transmittance suddenly become smaller. If the number of cycles is not good, the number of holding cycles is not greater than 3 0. In addition, if the number of cycles is small, τ I will prevent 丄 _d from rising to the reflection ratio. If it is larger than 5 ′, a large change in reflectance is obtained by the change in the refractive index of the dielectric layer 6 / t / Dingzhijiao> 17-200407880 'Therefore, the number of cycles is preferably 5 to 30. Then, the dielectric Changes in reflectance due to changes in thickness of layer 6 or 7 Figure 8 shows the ratio of changes in reflectance to the thickness of dielectric layer 6 or 7 when the number of cycles is 5. In Figure 8, the horizontal axis represents the thickness (d) and The ratio of the product of the reflection index to a wavelength U) (dn / again). When dn / is again 0.25, the reflection ratio will be approximately reduced 0 · 0 5, if dn / λ is shifted from 0.2 5 to increase the reflectance, as a result, the change in refractive index does not cause a significant change in reflectance, which is not a good situation. As shown in Figure 8, if In the dielectric layer 6 or 7, if /; 1 is 0.15 to 〇35, the reflectance is not higher than 0.1, which is a better case. If dn / λ is less than 0 "5 or greater than 0.35, the reflection is The ratio exceeds 〇〇. Therefore, the reflectance is not changed too much, which is not preferable. From these results, it can be understood that dn / λ is preferably in the range of 0.15 to 0.35 in the thickness of the dielectric layer 6 or 7. Next, several oxides are studied as the material of the dielectric layer 6. Table 1 lists changes in the refractive index and reflectance of the light-condensing layer 5. The light-condensing layer 5 is formed by using the dielectric layer 6 studied in the present invention. Made by. The laser wavelength is 405 nm, the intensity is 1.0 GW / m2, the dielectric layer 7 is composed of 80ZnS-20Si02 (molecular ratio), and its thickness is 44.0 nm. The dielectric layer 6 is adjusted to maintain dn / = 0.2 a value of 5, and the number of cutting cycles is five. < S5345 200407880

Table 1 Numbered dielectric layer Ni ki Ri n2 k2 r2 Δη (%) △ k (%) △ R Evaluation test sample 1 C〇〇〇 1.91 0.86 0.05 2.10 0.65 0.90 9.95 -24.42 0.85 A Test sample 2 Fe304 2.24 0.82 0.02 2.40 0.71 0.60 7.14 -13.41 0.58 B test sample 3 Fe203 2.05 0.50 0.04 2.21 0.42 0.55 7.80 -16.00 0.51 B test sample 4 ΝιΟ 1.82 0.81 0.06 1.95 0.66 0.52 7.14 -18.52 0.46 B test sample 5 V2〇5 1.73 0.21 0.06 1.88 0.10 0.65 8.67 -52.38 0.59 B test sample 6 Cr203 1.95 0.41 0.08 2.12 0.33 0.68 8.72 -19.51 0.60 B test sample 7 Mn〇2 2.13 0.52 0.08 2.34 0.41 0.75 9.86 -21.15 0.67 B test sample 8 CdS 2.22 0.84 0.10 2.42 0.61 0.71 9.01 -27.38 0.61 B test sample 9 A11-S1O2 2.06 0.44 0.05 2.21 0.32 0.53 7.28 -27.27 0.48 B test sample 10 Ag-Si02 2.34 0.45 0.06 2.51 0.34 0.54 7.26 -24.44 0.48 B test sample 11 Cu-Si02 2.12 0.35 0.06 2.27 0.28 0.51 7.08 • 20.00 0.45 B Comparative reference 1 Si02 1.46 0.01 0.06 1.48 0.01 0.07 1.37 0.00 0.01 C Comparative reference 2 CuCl 2.30 0.10 0.25 2.30 0.50 0.12 0.00 400.00 -0.13 C

In Table 1, η !, and and represent the refractive index, extinction coefficient, and reflectance measured at a laser intensity of 0 · 〇6 GW / m2, respectively, and n2, k2, and r2 represent lasers at 10 GW / m2 The refractive index, extinction coefficient and reflectance measured by the intensity, the variable of the refractive index Δ η and the variable of the extinction coefficient △ k are derived from the following expressions 85345 -19-200407880 respectively: Δη = :( η2-πι) / ΠιχΙΟΟ Δ k = (k 2-k 1) / ki X 100 The difference between the two reflection ratios ΔR is derived from the following expression ... △ R = R2 — Ri In the judgement column, if the reflection ratio is greater than Q7, the county Yuba A score of B is given if it is greater than 0.4 or less than 0.7 ', and a score of C is given if it is less than. Table m lists the test samples! Nos. 8 to 8 indicate changes in the refractive index due to absorption changes caused by electron excitation. These test samples are all used to reduce their extinction coefficients. Test Sample Cap! Nos. 7 to 7 are the evaluation results of the light-condensing layer 5 which has a film made of a transition metal oxide as the dielectric layer 6; Test Samples Nos. 9 to 11 are the evaluation results of the light-concentrating layer 5 The layer 5 has, as the dielectric layer 6, a film made of s102 glass in which gold, silver, and copper particles are dispersed in λ. As a comparative reference example, it is indicated that the light-concentrating layer 5 has a film made of Si0 2 as the dielectric layer 6 ′ and the light-concentrating layer 5 has a film made of CuC1 as the dielectric layer 6, which is an optical network material with an increased extinction coefficient. . In the case of using cobalt oxide C0304 as the test sample No. 丨 in Table ^, excellent results were obtained. Specifically, the variables of the refractive index and the extinction coefficient were specified as large variables, and the difference in reflectance was different. Is 0.85. In the first sample 1 1 I of the test sample (where the film is composed of a plate with oxides, Cds, and metal particles dispersed, and medium), the refractive index variable Δ η is about 7 to 9%. The difference is 0.45 and 0.67. In the case of reference 1 (where SiO 2 is used; 丨 see layer 6), if the intensity of the laser beam is changed to the right, its refractive index and extinction coefficient are 85.345 -20. 200407880, which is difficult to change, and the difference in reflectance is not low. Such as 〇〇]. In the case of Reference 2 (in which CuCl is used as the dielectric layer 6), its refractive index is difficult to change, and its extinction coefficient is increased from 0. to 0.5. In this case, the result is not good because the reflectance is reduced. As described above, in the case where the cut structure is made of a material with a decreasing extinction coefficient, a large change in the reflectance can be obtained without reducing the reflectance. As a material having a large difference in reflectance, cobalt oxide (C03) best choice. In addition, it can be understood that oxides of iron, nickel, Syria, roads, and junctions, and complexes of ammonite are also good choices, and the refractive index of europium is difficult to change, which is a poor choice. Therefore, as the material of the 4 dielectric layer (a component of the light-concentrating layer), the preferred material is a transition metal oxide or sulfide, selected from the group consisting of cobalt iron, nickel, vanadium, and chromium Oxides or sulfides of manganese or cadmium. The best material is cobalt oxide (c0304), which shows a very large reflectance. (Second example) The recording of the micro information hole and the evaluation of the reproduction characteristics are shown in Figures 1 to 16. The micro information hole is formed on an optical disc carrying the above-mentioned light-concentrating layer and RA Μ structure. on. / 9 illustrates in a block diagram the optical information recording and re-recording used in this example ′ This device includes a media clock unit 101, which is used to identify-light, = is an optical storage medium. Guang Jia is temporarily or indirectly connected to the —horse, ~, and 10,000-degree shafts and fixed to —the rotating mechanism, and the motor 103 is controlled by —: the circuit control unit 丨 02. —The sensing unit reads the optical disc :: the light signal 'This sensing unit senses the light from the-optical hybrid to-the optical read head; the reflected laser beam is located at the light source called S5345 ^ ρ east, which is used by the optical read head. Record the green information on the optical disc 100, the optical read head] 04 is positioned in the tracking direction by a read head action unit. ', /-The optical signal passes-pre-amplifier 105,-reads the signal processing unit and arrives at the address Master unit 1 07 and clock synchronization signal reading unit 1 08, Yuan :: Da, W demodulation and conversion unit 109, using a read signal to transmit the unit ^ 〇, the light "from the read signal The clock release unit 1G9 is output outward. It is only necessary to use the preset output method (such as-display unit or _ player) to radiate the inflammation, or use an information processing device (such as a personal computer) to process it. In this example, 'in addition to the circuit system used for general recording and reproduction, it is also:-, a radio selection unit ⑴, which can select any laser wavelength, select the output of the flat 1 1 1 according to the laser ^, and use The peak power of the wave power determination unit 1] 3 is based on the analysis result of the laser power control information analysis unit n 2 plus M fixed °. The same principle is also determined by the read power. The single core 9 determines the read work. The output of the peak power determining unit 113 passes through a power ratio determining unit Η4, a recording power such as the amplifier U5, and a erasing power such as the amplifier] 6 Where then it reaches a laser driver] 17, the light source located in the optical read head is Controlled by laser driver 117. Similarly, the output of a read power determining unit] 19 is applied to the laser driver 1 P via a read power dc amplifier π 8. The two-ray driver 117 controls the light source located in the optical read head. The actual laser is: Semiconductor lasers with wavelengths of 650 nm and 450 nm. This device has an auto-focusing mechanism. Since each wavelength has a corresponding focal point or depth of focus, the auto-focusing mechanism adjusts the focal point according to the selected laser. In addition, 'condensing layer 5 is formed on the disc, as the tracking width becomes thinner and thinner-200407880, a high-density recording detector L included in the tracking error detection unit 126 is provided to make tracking possible. In any kind of media. The information of this tracking error detection soap element 126 is transmitted to the optical read head through a controller 124 and a read head control circuit 125. In addition, a media type clock mechanism is provided, which is operated by using the difference of the reflectance of each medium. Agency, which allows for automatic tracking based on various types of media. In the recorded data, the data is input from a writing data receiving unit 120, and then modulated by a writing data modulation unit 12, and the modulated data is input to a laser driver through a writing timing correction unit] 22 In 7, according to the data 'laser driver', 7 controls the light source located in the read head 104. The configuration shown in FIG. 9 can be used to compatible use any type of optical recording medium with a corresponding wavelength, and to handle a disc with a corresponding recording amount in one device. At present, the recording amount of optical discs is increasing, and the configuration of the optical information recording and reproduction device can be appropriately adjusted according to the purpose of its use. In this example, a Co. 04 film is used as the dielectric layer 6, and its refractive index has been changing. As a comparative reference sample, the optical disc without the light-concentrating layer 5 is also manufactured and evaluated in a similar manner. Figure 〖0 illustrates the length of the recording information hole pair reproduction output strength (mark length) (S / N ratio) in a RAM disc. 'The RAM disc produces regular intervals and equal shaped recording information holes. The read laser wavelength is 405 nm and laser power of 0.5 mW. It can be understood that the optical recording medium of this example (in which the light-concentrating layer 5 is formed) has a heavier reproduction output for short and shorter mark lengths than the comparative reference medium of Dianguangguang. In the case where the light-condensing layer 5 is formed, it can be understood that reproduction can be performed at a shorter mark length, so that the light-condensing effect on the RAM disc is ensured. Position 45 200407880 'Ziwan, from the sample tests listed in Table 1] to i! To form a dielectric ^ light-concentrating layer 5' also ensures the same light-concentrating effect as above, but for the formation of dielectric The comparative reference medium of the layer does not ensure the above-mentioned light concentrating effect. (Third example) And check whether the ROM disc has a light-concentrating layer. 5 The figure illustrates that ROM + 1 manufactured according to the present invention represents a substrate, and the number 2 represents a sequential focusing effect when a ROM disc is manufactured. Figure 1 To indicate a section of the disc. In Fig. 11, the number of reflective films, number 5 and 5 represent a light-concentrating layer, which is composed of a repeating combination of dielectric layers and 7 and π + 20 represents an information hole formed on the substrate. Substrate 丨 Polyester, polyolefin (polyolefine), or glass (each used according to the specifications) jin 'This example uses a substrate made of polycarbonate, like a ram disc, manufactured in this example The ROM track includes a flat-groove structured tracking format as shown in FIG. 16, which writes information on any track of the ROM track. The ROM disc is manufactured according to the following process: first, a laser beam is used to form an information hole pattern with information on the photoresist layer; then, the information hole pattern beam is copied on a N1 mold, injected into polycarbonate and A mold is formed on the mold to form the substrate, and a reflective film 2 with a thickness of 50 nm is formed on the substrate. The substrate 1 has a thickness of 1.1 mm, and the cover layer has a thickness of 1. [m]. The method of forming a film and a cover layer shown in FIG. 11 is the same as the method used in the case of manufacturing the R AM disk shown in FIG. In this example, a light-concentrating film 5 is formed with a film having test samples No.] to 丨] as its dielectric layer 6, and then the light-concentrating characteristics of this layer 5 are evaluated. In addition, a light-concentrating layer is formed as a comparative reference medium As the dielectric layer 6, a film having Si02 (listed in Comparative Example 24-200407880 Tea Test Example 1 listed in Table 1) was used, or no light-concentrating layer was formed in the medium. When diversifying reading power in the range of i mvv, 2 mW, 3 mW, and 4 mW, 'check the composition of the light-concentrating layer formed in the manufactured disc and the reproduction of low-frequency components (2 MHz) and high-frequency components (10 MHz) The output characteristics and the light-concentrating characteristics were evaluated. The evaluation results of the light-concentrating characteristics are shown in Table 2. In this article, the light-condensing characteristics indicate that compared with the diffraction limit defined by light waves, a lower recording information hole can be selected at a higher output. 'The laser beam used to read information is a semiconductor laser with a wavelength of 4.05 nm. Shoot. Table 2 2 Condensing layer 2 output (dB) 2 MHz 10 MHz Resolution dielectric layer 6 0.5 mW 1 mW 1.5 mW 2 mW 0.5 mW 1 mW 1.5 mW 2 mW Effect 22 23 25 28 A 2 Fe304 38 40 41 40 12 14 17 21 B 3 Fe20, 35 36 36 37 13 14 18 20 B 4 NiO 43 44 45 47 15 17 21 22 B 5 V20, 39 40 45 42 14 18 20 21 B Test 6 C: r: 〇3 3S 35 38 40 15 18 20 21 B Sample 7 MnO: 38 38 39 38 14 16 18 20 B 8 CdS 36 39 32 37 13 15 16 19 B 9 Au-Si〇2 37 38 38 39 15 17 19 21 B 10 Ag-SiO: 38 39 41 40 14 16 18 22 B 11 Cu-SiO: 35 36 36 35 16 19 21 23 B SiO: 36 35 35 37 2 3 2 4 C Comparison 4 None 37 36 35 37 1 2 2 2 C Reference condenser layer 200407880 The frequency dependence of the reproduced output characteristics is analyzed by a frequency analysis unit. Figure 1 7 illustrates a measurement example of the reproduced output characteristics provided by the spectrum analyzer. Remanufactured output characteristics of an optical disc with a dielectric layer 6 (such as the test sample No. 1 in Table 1) that includes c0304 and an optical disc without a light-concentrating layer formed on it. The laser power for both optical discs is 1 mwIn the case where the film of the test sample No. 1 is formed as a light-concentrating layer, it is ensured that the output level is higher in the range of higher frequency components than the comparative reference medium. On a ROM disc, the high-frequency component of the signal is depicted as a 2 coarse pattern of poor holes. Therefore, in the case of forming a light-concentrating layer, a rough information hole pattern is read, reproduced, and outputted. This indicates that a comparison is being made. The focusing effect is obtained in the case of the focusing layer of Reference Example No. 1. This phenomenon is caused by a change in the refractive index of the focusing layer during field beam emission. The condensing effect caused by the change in refractive index will be described with reference to Figures 12 and 13. In Figures 12 and π, the number 20 represents a green information hole and the number 21 represents a laser beam. Figure 2 illustrates the recording information hole pattern and the reflected laser beam provided if the optical information recording green medium does not include the light-concentrating layer 5. Figure 12 also shows the recording information hole provided if the medium includes a layer. The amount of light in the pattern and reflected laser beam. The laser beam moves on the orbit toward the arrow of Figure 2 or 3, as shown in Figure 12, if the light-concentrating layer 5 is included, the reflection ratio is the same in all laser emission areas, so the laser beam is reflected in all areas. Therefore, the information on one of the positive emission areas is received at one time. As a result, the information hole and parts other than the information hole are used to consistently reflect the laser beam, which can reduce the information from the information hole only. For this reason, the difference in the reflection ratio between the information hole and the pixels other than the information hole can be made smaller, which means that the reproduced signal has a worse C / 'N ratio than 45 200407880. On the other hand, considering the reproduction in the case where the optical information recording medium includes the optical layer 5 as shown in Figure Η, the laser emission changes the refractive index of the condenser layer by 2 and is in front of the laser emission area (Figure B) in 13), the time after the laser is emitted is short, so this area is the area where the refractive index is not changed. On the other hand, after the laser emission area (a in Figure 13), the time ^ after the laser emission is too long, so this area is the area where the refractive index is changed. Adjust the optical meter (such as the refractive index and thickness of the reflective film and the protective film). Reduce the light reflection ratio to a minimum value in a state of ϋ index. It is assumed that in a state where the refractive index of the reflective film is not changed, the reflectance ratio ⑸ is caused, and no light is reflected from the area b. ⑽ In this situation, the change in the refractive index of the light-condensing layer causes the above-mentioned optical design to be shifted ', thereby making the reflection higher, that is, the laser beam is reflected only in the part (area a) where the reflection = is changed. In this state, the area of the return reflection line is narrower than that in the case of general reproduction as shown in FIG. 12. Therefore, this state can be read from the information hole and from the information hole with good C / N and 鬲 contrast. Xin Lin from parts other than the information hole. It is expected that the change in the refractive index of the light-concentrating layer caused by the returning laser beam causes the light-concentrating effect. As a result, as shown in FIG. 10 ', the information from the micro-information hole can be reproduced. The description of the determination of the condensing effect in Table 2 is as follows: • The reproduced output at 2 MHz or 10 MHz is read from the spectrum shown in Figure 7, and the output of the mW laser beam intensity and ^ MHz still-frequency signal is not The situation where the crime is less than 20 is called a; the situation where the rotation is not less than 13 dB and less than 200 dB is called B. In these cases, the light focusing effect is ensured. In addition, the output is called c in the case of less than 8 dB, and the focusing effect is not ensured in this -27-200407880 case. In the film formed by the test sample No. C04, the output of the high-frequency signal at [1Ί1ν / laser & degree] and 0 MHz is not less than 13 dB to less than 20 dB. The result is B. On the other hand, compare the reference examples! In 2 and 2 although a high output is obtained at a high frequency signal of 2 MHz, the output at a frequency of | 0 mHz is not strong, and in this case, the light collecting effect is not ensured. As explained above, in the case where the light-concentrating layer 5 of the present invention is formed on a ROM-type optical disc, a good light-concentrating effect can be obtained. Therefore, an optical information recording medium (such as a ROM) having the light-concentrating layer 5 of the present invention can be obtained. Discs, etc.) allows reading information from its micro-recorded information hole with high sensitivity. (Fourth Example) Then, the film degradation caused by repeated remanufacturing is studied, and the evaluation is performed by repeatedly transmitting a remanufactured signal beam on the RAM disc shown in Fig. 丨 and detecting the remanufactured output. The laser wavelength is 405 nm, and the laser power is mW. The length of the ball mark is 0.2 μΐΉ. The No. 0304 film of the test sample No. 1 in Table 1 is used as the interlayer 6 (concentrating layer). 5's-ingredients) 'organic membranes selected as the reference example. FIG. 14 illustrates the relationship between this output and the time of repeated reproduction. It can be understood that the optical disc on which the organic system film has been formed gradually decreases its output after about 104 repeats; the other party has the above according to the present invention. The optical disc formed of a glass film does not substantially reduce its output even after a repetition time of 1.5 '. As described above, even if it is repeatedly reproduced many times, it is believed that the optical disc of the present invention still maintains the light collecting effect. In the case of using the other 唉 of the test sample Nos. 2 to 丨 丨 in Table 1 as the glass film, the optical disc pair can be repeatedly reproduced to maintain high stability ⑸45 200407880

Sex. Then, regarding the optical disc having the light-concentrating layer 5 of the present invention, the reaction rate was studied to produce the DVD-RAM structure shown in FIG. 1, and the mark length thereof had a fixed value of 0.2 μm. When the reading power was maintained at 1 mW, the linear rate of rotation was changed. When the dielectric layer 6 with the light-concentrating layer 5 was formed on it, the C 0 3 04 film of the test sample No.] was used. Figure 15 illustrates the ratio of the C / N ratio to the linear rate of rotation. In the case of using the water-light layer 5 according to this example, it can be understood that the water-light effect is obtained at a linear rate of about 20 m / sec, and 鬲 C is obtained. / N ratio. This is because the change in the refractive index of the dielectric layer 6 in the light-concentrating layer 5 does not follow the increase in the disc speed, and the difference in the reflectance between the recorded portion of the Bexun and the unrecorded information is not fully obtained. In the case of using the light-concentrating layer 5, if the disc rotation rate is less than 20 m / sec ', a sufficiently large change in refractive index will occur, and a high d cannot be guaranteed. However, the disc rotation rate exceeds 2 Qm / see, and the change in refractive index fails to keep up. This rate '俾 makes the variation of the refractive index smaller, and the m-light effect fails to reach a sufficient level. (Fifth example) The above research has been directed and stopped, and 4 times, / ... first "3" optical recording media, focusing layer to inform J multiple dielectrics; & 40% 'by emission In the case of the laser beam to form the refractive index of each material, m times, the number of the present invention is calculated by the emitted "J" layer of winter film, and its 恻 mask of the optical disc. The manufacturing example of this example represents 1 W in _ 'digital H substrate, digital generation and a reflective layer, the number 3... „Represents a security layer, the number 4 represents a record / 200407880, and the number 208 represents a temporary F ^ Changed. The light-concentrating layer is located in the two genus numbers by emitting the laser beam, and there are tens of thousands; the combination of the two layers is composed of each combination and ^ repeated pairing. In addition, the number 8 represents-cover layer, two : In order to control the reflectance of a blue electric beam with a wavelength of 4.05 m and a wavelength of '1 2 腠 (its reflection index is 丨 .47) as the dielectric layer 206, the 哕 film has a thickness of 69' as for the dielectric layer 2 〇 7 by 8QZnS_2QSi〇 ^ 子

Ratio) boat (whose refractive index is 2.30). The thickness of the film is 44 mm. The other layers (such as the reflective layer, the protective layer, and the recording layer) are the same as those in the first example. In FIG. 20, a plurality of stacked layers 205 are composed of three cycles of a combination of dielectric layers 206 and 207. A plurality of #layers are employed by a dielectric layer and a two-cycle combination of 207 Make up. In general, the number of cutting cycles of a plurality of laminations is changed in a range of 5 to 30 cycles, and the change in the characteristics is studied. Already

Bismuth is made of an optical disc having the same composition as shown in FIG. 20. In this optical disc, a plurality of stacks 205 and 205 located on both sides of the light-concentrating layer 208, each having a cutting period of μ period. For this disc, check the dependence of the reflectance on the wavelength in the excited state and invariant state. Here, the excited state refers to a state in which the refractive index of the light-condensing layer 208 is changed by emitting a strong laser beam, and the constant state refers to a state in which the refractive index of the light-concentrating layer 208 is not emitted by emitting a weak laser beam. Changing state. In order to examine the dependence of the reflectance on the wavelength in the excited state and invariant state, an experimental system as shown in Fig. 23 is manufactured. In Fig. 23, the number 2 1 0 represents a nanosecond pulse laser for excitation The number 2 Π represents a nanosecond pulse laser for measurement, the number 212 represents a disc test sample, the number 2 丨 4 represents a half mirror, the number 2 丨 5 represents an optical detector, and the number 2 丨 6 represents a display Wave cry

X5US -10-200407880

The number 21 7 represents a delay generator, and the number 21 8 represents a mirror Q. A YAG-OPO laser with a YAG laser beam source is used as a nanosecond pulse laser 2 1 0 for measurement and a nanometer for measurement. A second pulse laser 2 |] is used to oscillate a 5-ns pulse at a frequency of 20 Hz. YAG-OPO laser can supply a variety of different laser beams with various wavelengths through a wavelength diversifying element, and the measurable wavelength region varies from about 300 nm to about 2000 nm. In this experiment, the wavelength of the excitation pulse laser has a fixed wavelength of 405 nm, while the wavelength of the measurement pulse changes from 350 nm to 750 nm. The excitation pulse laser emits a laser beam at an angle of incidence of 45 degrees On the test sample disc, the measurement pulsed laser beam is incident perpendicular to the area where the excited laser beam is being emitted. Then, the measurement pulse laser beam is reflected by the half mirror 214 and enters the optical detector 2] 5. In order to synchronize the measurement pulse laser beam and the excitation pulse laser beam at the pulse generation position, the delay generator is provided so that the two pulse times are consistent with each other via the oscilloscope 216. The ratio of the amount of reflected light from the π guan to the voltage seen in the oscilloscope 216 'In Λ, measure the voltage of this oscilloscope 216 as the amount of reflected light, meaning' perform two experiments to measure the measurement radiation applied when there is no emission laser beam Beam denier: Scanning the wavelength of each beam in the range of · 350 to 750 ° in the range of 1 nm to 1 nm, and getting the amount of reflected light in a constant state = Top: In the case of a reflective film Perform a similar method to measure the light: 里 'reflection of the disc to be measured with the amount of light reflected by the aluminum reflective film = r:' and then obtain the reflectance of the disc to be measured, by measuring wave 4 to reflectance in a constant state Dependence on wavelength. Next, by emitting a 405_wave -31-200407880 excitation pulse radio that is synchronized with the measurement pulse laser beam, and measuring the measurement iμ in a similar manner, the dependence of the reflection ratio on the wavelength in the excited state is obtained. In this way, the dependence of the reflection ratio on the wavelength in the invariant state and the excited state of the optical disc is demonstrated here. In the test, a skin-length pulse laser is used to emit the beam vertically; 'So' on the disc can simulate the non-linear optical processes appearing on the disc. The solid line in Figure 21 illustrates the dependence of reflection ratio on wavelength. The reflection ratio reaches about 9G% at all wavelengths. The beam is absorbed around its full wavelength, so that the reflection ratio is small around it (about 20%). ), And then a laser beam with a wavelength of 4.05 ㈣ is emitted to the area where the white rays are focused and emitted to check the change of the reflectance. This change is shown in FIG. 21 as a dotted line. That is to say, it is found that the absorption material is shifted to the vicinity of a wavelength of about 413 nm. It is found by the fact that 'the absorption wave is shifted before and after the emission of the 405 wavelength laser beam, and when the attention is focused on the 405 nm wavelength, the reflection ratio From 2 ()% to μ. The occurrence of this drastic wavelength characteristic is the combination of repeatedly cutting multiple layers with individual refractive indices (as shown in Figure 20) and forming a light-concentrating layer 208 (a film with extremely different optical characteristics, which is derived from a complex number Results between layers). Such characteristics are determined based on optical constants (such as the thickness of the material, the refractive index and the extinction coefficient, etc.), for example, as shown in FIG. 21, when a plurality of 4 layers are formed so that the film can be changed to 405 in a constant state In the h hair whose nm wavelength reaches the absorption wave, the refractive index of the light-condensing layer in the excited state is different from the refractive index of the light-concentrating layer in the invariable state. The film thickness is unchanged. So the interference condition in the 'excited state is different from the interference condition in the invariant state. In the graph of FIG. 21, the reflection characteristic is shifted toward a long wavelength, and the light 200407880 can be adjusted so that the reflection characteristic can be shifted toward a short wavelength. In this case, 'If you know, the jade force is concentrated on 405 At the wavelength of nm, there is a significant change in the reflectance, which is good for car and cross. It has been found that in order to cause this significant change in the reflectance, it is effective to keep the rise angle of the peaks greater than 60 degrees. In this case, the difference in the reflectance in the wavelength region of the knowledge and foot is so large that the signal resolution can be increased. (That is, the S / N ratio becomes higher). An optical disc having a film composition as shown in FIG. 20 was manufactured according to the person / person ', and the reflection ratio of the optical disc was checked at a 405 nm wavelength plate, and the number of rotations of the optical disc was 10 m / s. Fig. 22 illustrates the ratio of the reflection ratio to the laser beam intensity. When the laser beam intensity increases, the reflection ratio rises cryingly. This is because the change shown in Fig. 21 and the reflection ratio are increased on the optical disc. The C / N ratio of the length of the mark is measured and measured one by one to reach a mark length; the middle of the: 彳: small mark may also perform high-power reading and writing of information. In this example f, the cutting cycle of the multiple stacks 205 is the same as the cutting history of the multiple stacks 205. As shown in FIG. 20, the expired ones are judged in the multiple #layers 205 and the coffee. The number is optional. A plurality of layers # 205 and # 205 can be changed individually. Instead, the non-linearity of the present invention can be used. Optical information recording medium with high S / N ratio. Shan & 4 4 The wife should still understand that Wei Weiyi made the best and the best in accordance with the present invention's examples, but does not limit the present invention ^ It is not necessary to depart from the spirit of the present invention and the scope of the patent with Fan Tianshou. 5F can make a variety of different [Simplified illustration] 200407880 An example of a RAM disk manufactured to estimate a non-linear optical film. Figure 1 illustrates a segment according to the present invention as an example. Figure 2 illustrates a segment according to the present invention. Figures illustrate the use of optical systems; Figures 3 A and 3B graphically illustrate the time variation of a refraction guard τ4, and the extinction coefficients of the two-field shot pulses obtained by estimating the optical system shown in Figure 2; The graph illustrates the relationship between a refraction index and a laser pulse intensity with respect to the number of shots shown in FIG. 3; and FIG. 5 illustrates the relationship between the refraction index illustrated in FIG. 3 with an extinction coefficient and the laser pulse intensity with a graph Figure 6 illustrates the relationship between the two changes in a graph, one is the refractive index change of a dielectric layer, and the other is the refraction caused when the number of cycles of the dielectric layer (which includes the -concentrating layer) is changed. Exponential change; Figure 7 with curve Describe the change in transmission factor caused by changing the number of cycles of the dielectric layer (including the light-concentrating layer); Figure 8 shows the change in refractive index caused by changing the dn / λ of the dielectric layer with a graph; Τ diagram 9 Illustrated with a conceptual diagram of the optical disc remanufacturing device manufactured according to the present invention; FIG. 1 〇 When the α & π 1 curvature according to the present invention illustrates the presence or absence of a light-concentrating layer of the optical disc, -C / The N ratio is related to the change of the length of a unit of 4 J ^; Figure π is an example of the ROM disk manufactured by the present invention in accordance with an example of Figure X.

The principle of general laser beam reproduction is not used; the principle of reproduction in the case where no light-concentrating layer is formed; 200407880 Fig. 4 illustrates the degradation of the output according to the present invention, which is the output of the repeated reproduction time of the optical disc Figure 5: According to the present invention, the month-to-month C / N ratio changes according to the linear rate of the optical disc (with the light collecting layer); Figure 16 illustrates a RAM manufactured according to the present invention-an example in a side perspective view And ROM; Figure 乂 graph illustrates the output of the signal frequency to the ROM disc, the ROM disc is manufactured according to the present invention-an example; the figure illustrates the extinction of a wavelength in the light-concentrating layer used in the present invention with a curve diagram Dependency on coefficients; FIG. 19 illustrates the dependence of a wavelength on the extinction coefficient of the light-concentrating layer used in the present invention in a graph, and FIG. 20 illustrates the side structure of an optical disc manufactured according to the present invention in a non-standard manner; FIG. 21 illustrates in a graph a beam reflected on a plurality of stacks, the dependency of the slope length t. The plurality of stacks have the same film structure as the optical disc structure manufactured according to the present invention shown in FIG. 20; FIG. Figure Explain the relationship between the intensity of a laser beam and the index of refraction. The index of the index is shown on the optical disc caused by the application of a thorough wavelength laser; 1 substrate Ί reflective layer 200407880 4 recording layer 5, 208 light-concentrating layer 6, 7, 206 , 207 Dielectric layer 8 Overlay 9 Pulse generator 10 Light source 11 Polarizer 14 Analyzer 15 Filter 16 Light receiver 17,216 Digital oscilloscope 18 Control computer 19 Focus lens 20 Information hole 100, 212 Disc 101 Media identification unit 102 Motor Circuit control unit 1 03 Motor 104 Optical read head 105 Pre-amplifier 106 Read signal processing unit 107 Address read unit 108 Clock synchronization signal read unit 1 09 Read signal demodulation and conversion unit S5345 -3Γ)-200407880 1 10 111 112 1 13 114 115 1 16 117 118 119 120 121 122 Read data transmission unit Laser selection unit Laser power control information analysis unit Peak power determination unit Power ratio determination unit Record power DC amplifier Erase power DC amplifier laser drive The reading power of the reading power DC reading unit determines the unit to insert data into the receiving unit to write data Modulation unit write timing correction unit 124 125 126 200, 205, 205 '2012 10, 21 1 214 215 17 controller's read head control circuit tracking error detection unit multiple stacked recording patterns nanosecond pulse laser half Mirror Optical Detector Delay Generator Mirror-37-21

Claims (1)

200407880 Scope of patent application: Type of plant: Assets: green media 'includes-recording layer for recording optical information, 禝-a layer' and a substrate to support these layers; when emitting-㈤ beam '~ The absorption peak in the spectral reflectance curve is shifted to the -wavelength side', which is longer or shorter than the peak before the laser beam is emitted. 2. If the optical information recording medium in item 1 of the patent application scope, the rising angle of the absorption peak before or during the two shots in I is: or two degrees. 3. The kind of optical information is recorded in green media, including-directly or via another-layer in the _ · substrate shape ^ <optical recording layer; a plurality of layers directly or via another-layer adjacent to "qiu", and the The plutonium layer is formed by cutting a first-and-first dielectric layer at least twice, and the first and second dielectric layers have individual refractions to a laser beam that feeds _ yuan and feeds a poor signal. Index, the refractive index of each of the first and second dielectric layers can be reversely changed according to the Putian beam, and its extinction coefficient can also be reversely reduced. 4. For example, the optical information in the third scope of the patent application Recording medium, wherein the first medium, layer system-a film including particles having a group consisting of Co, Fe, Mi., V Mn, Cr, Cd, Cu, Ag, Pt, and Au and its oxidation At least one element selected from a substance or nitride, and the second dielectric layer is a film including an oxide, an oxide, or a sulfide of Si, 7 ^, or 211. 5. As described in the patent application No. 4 Information recording medium, wherein the first dielectric layer includes CoO304, and the second dielectric layer includes Si02, ZnS-S, and Si At least one material selected from the group consisting of 3I <4. 6. An optical information recording medium including an optical recording layer formed directly or through another layer on a 200000788 substrate; a plurality of direct or Adjacent to the edge optical recording layer (stack; another first dielectric layer is formed between the optical recording layer and the plurality of stacks, or between the plurality of ® layers, directly or via another layer), and The violation layer is formed by cutting a second and a third j 4 layer at least twice, and the second and third dielectric layers have individual refractions to a laser beam used for recording and reading the poor signal. Index, the refractive index of the second dielectric layer can be reversely changed according to the intensity of the laser beam, and its extinction coefficient can also be reversely reduced. For example, the optical information recording medium in the sixth scope of the patent application, where the The first dielectric layer is a film including particles having a group consisting of co, Fe, Ni, V, Mn, Cr, Cd, Cu, Ag, Pt, and weights, and Measured by a laser beam with an intensity of 0.1 6 G W / m2. 1 〇. — A kind of optical information recording device, including: The stacks near the optical recording layer, a plurality of stacks, directly or through another layer, are formed by cutting at least two times 20040880 to cut a first and a second dielectric layer. The first and The second dielectric layer has an individual refractive index for a laser beam used for recording and reading information, and the refractive indices of the first and second dielectric layers can be reversely changed according to the intensity of the laser beam. The extinction coefficient can also be reduced in reverse; and an optical read head for emitting the laser beam onto the optical recording layer, detecting the amount of light of the reflected beam, and reading information from the reflected beam. 1 丨 An optical information recording device comprising: an optical information recording medium including a light recording layer formed directly or via another layer on a substrate; a plurality of optical recording layers adjacent to the optical recording layer directly or via another layer A lamination; a first dielectric layer is formed directly or via another layer between the optical recording layer and the plurality of laminations, or in the plurality of laminations; and the lamination is performed at least twice Formed by cutting a second and a third dielectric layer, the second and third dielectric layers have individual refractive indices for a laser beam used for recording and reading information, and may be based on the intensity of the laser beam. Changing the refractive index of the second dielectric layer in the opposite direction, and also reducing its extinction coefficient in the opposite direction; and an optical read head for emitting the laser beam onto the optical recording layer and detecting the reflected beam The amount of light, and reading information from the reflected beam. 1 2. An optical information recording device, including an optical information recording medium, including a recording layer for recording optical information, a plurality of stacks, and a substrate for supporting the layers; a laser is being emitted Shifting the absorption peak in a spectral reflectance curve to a wavelength side, which is longer or shorter than the wave before the laser beam is emitted; and an optical read head for transmitting the laser beam to the east On the optical recording layer, the detector 200407880 measures the light amount of the reflected beam and reads information from the reflected beam. 13. The optical information recording device according to item 12 of the scope of patent application, wherein before or during the emission of the beam, the rising angle of the absorption peak is at least 60 degrees. ⑸4.S